posted 01-20-2002 12:07 PM
I heard that the casting in the valley of a 5.0 with yyy is supposedly stronger and is out of a truck. If so my 5.0 came out of a lincoln (used 2.3 sparkplugs) and has this casting. Does anyone know?
posted 09-28-2002 01:54 AM
dont beleive what they say about "y"s and "x"s. they are the same metal, they are the same strength. the mexican blocks has more beef to them, those are the ones to get, next to the a4's.